PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-12:43:30
G02     59.6           31.9                5.7 +/-    0.75       9.7 +/-    0.75  0.030 / 0.030
G05     60.8           62.7                7.5 +/-    0.90       8.3 +/-    0.90  0.030 / 0.030
G12     186.7          35.4               10.0 +/-    1.32      15.7 +/-    1.32  0.050 / 0.070
G13     130.5          14.1                5.1 +/-    4.68      13.0 +/-    4.68  0.050 / 0.080
G15     163.4          11.6                4.3 +/-    8.94      11.5 +/-    8.94  0.040 / 0.050
G20     208.5          55.7               12.4 +/-    1.09      14.7 +/-    1.09  0.040 / 0.070
G21     272.1          21.2                5.8 +/-    1.95      12.5 +/-    1.95  0.150 / 0.350
G25     238.7          52.7                9.7 +/-    1.78      11.8 +/-    1.78  0.230 / 0.540
G29     330.9          57.1                4.7 +/-    0.56       5.4 +/-    0.56  0.120 / 0.360